<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 Not Found</title>
    <style>
        body {
            font-family: 'Arial', sans-serif;
            text-align: center;
            background-color: #f4f4f4;
            margin: 0;
            padding: 0;
        }

        .container {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        h1 {
            color: #333;
            font-size: 4em;
            margin: 0;
        }

        p {
            color: #777;
            font-size: 1.2em;
        }

        a {
            color: #3498db;
            text-decoration: none;
        }

        a:hover {
            text-decoration: underline;
        }
    </style>
</head>
<body>
<div class="container">
    <h1>404</h1>
    <p>Oops! 页面未找到。</p>
    <p>返回 <a href="/">首页</a></p>
</div>
</body>
</html>
